Insulating material and process of producing same.



UNITED STATES Patented December 27, 1904..

PATENT QEETcE.

INSULATING MATERIAL AND PROCESS OF PRODUCING SAME.

SPECIFICATION forming part of Letters Patent N0. 778,529, dated December 27, 1904.

Application filed November 1, 1904. Serial No. 231,028.

To all mil/07w it In/my concern:

Be it known that I, FRED ERICKH.BRUENING, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania. have discovered or invented a new and useful Improvement in Insulating Materials and Processes of Producing the Same,of which improvement the following is a specification.

hly invention relates to insulating materials and process for producing the same.

The object of my invention is to produce a material which is a non-conductor of heat, cold, and sound, is waterproof, and non-expansible and non-contractible When subjected to the action of heat, cold, and water. The material so produced is capable of use in all classes of construction where insulation from the elements specified is desirable or necessaryas, for instance, in refrigerators and like constructions used in breweries, in the walls of buildings where even temperatures are necessary or desirable to be maintained, between the floors of buildings where it is desirable to deaden concussion or lessen sound, or, in fact, any construction in which insulation is necessary or desirable.

The material produced comprises cork, treated as hereinafter described, incorporated in cement or coalescing compound consisting of tar or pitch, comminuted or ground flint or silica, ground clay, comminuted or ground feldspar, oil of rosin, and litharge mixed in the proportions and treated as hereinafter specified. In the production of said material the cork-2l 6., the granules or waste cork of any formis first reduced to any desirable-sized particles,dependent on the density or closeness of texture of the material required. The cork is then subjected to a drying process by heat in any suitable vessel suflicient to drive off all the volatile matter that may be con-' coalescing compound in Which the cork is incorporated comprises or consists of tar or pitch thirty-eight parts, the tar or pitch being previously prepared by subjectingthe same to heat from 400 to 500 Fahrenheit or to a suflicient heat to clarify the same by boiling. I have found by practice that heat ranging from 400 to 500 Fahrenheit produces satisfactory results. Sixteen parts of comminuted or ground flint are subjected to heat ranging from 500 to 600 Fahrenheit, eight parts of ground clay are subjected to heat ranging from 1:00 to 500 Fahrenheit, eight parts of feldspar comminuted or ground and subjected to approximately 500 Fahrenheit, two parts oil of rosin mixed with tWo parts litharge, acetate of lead or Zinc, the said oil of rosin and litharge being mixed and subjected to heat ranging from 500 to 600 Fahrenheit. The litharge or acetate of lead or Zinc is placed in a bagand submerged in the oil of rosin during the boiling process. The purpose of subjecting the flint, clay, and feldspar to the degrees of heat above specified is to drive off Whatever moisture may be contained therein. The compound above specified is thoroughly mixed and subjected. to a heat sufficient to bring the same to a syrup-like consistency, and when in this condition twenty-six parts of prepared cork are mixed or incorporated therein, and when thoroughly incorporated the compound is poured or charged into molds of suitable size and configuration, dependent upon the articles or form of material required, and when the same is cool and sufiiciently compressed the material is ready for use. acetate of lead or zinc subserves the function of a drier, the flint, clay, feldspar, and cork furnish the body or base, the flint and feldspar,in conjunction With the softer material, (clay,) subserving the additional function of a binding material. The pitch or tar and oil of rosin when subjected to the heat specified give to the entire mass fluidity sufiicient to enable the same to be poured into molds.

I claim as my invention or discovery and desire to secure by Letters Patent-- l. The herein-described process for producing insulating material Which consists in subjecting cork or cork-wood to sufficient heat to The litharge or drive ofl the volatile matter contained therein then incorporating the same in a cement or coalescing material comprising pitch or tar boiled 0r subjected to heat, flint, comminuted or ground, ground clay, ground feldspar, oil of rosin and litharge thoroughly mixed in the presence of heat sufficient to reduce the same and the pitch to a fluid condition, and finally pouring the compound into molds.

2. An insulating material comprising twenty-six parts of cork first subjected or dried in the presence of heat as herein specified, thirty-eight parts of pitch or tar, subjected to heat as herein specified, sixteen parts of ground flint, subjected to heat as herein specified, eight parts of clay, subjected to heat as herein specified, eight parts of feldspar, subjected to heat as herein specified and two parts each of oil of rosin and litharge, mixed and subjected to heat as herein specified, the 20 said materials being thoroughly mixed and incorporated as herein specified.

In testimony whereof I have hereunto signed my name in the presence of two subscribing Witnesses.

FREDERICK H. BRUENING.

In presence of CLARENCE A. WILLIAMs, JOHN H. RONEY. 

